JP2009094718A - Radio system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems wherein handoff frequently occurs, when position registration information is frequently notified from a mobile station terminal, a line controller is unable to smoothly retrieve the position registration information, speech communication tends to be interrupted, and it leads to an increase in traffic, to reduce communication traffic, and to provide an efficient handoff system. <P>SOLUTION: The radio system comprises a sensor network radio terminal provided inside the speech communication area of a radio base station and a monitoring server connected to the sensor network radio terminal for outputting the latest position registration information of the mobile station terminal to the line controller. The sensor network radio terminal detects the mobile station terminal inside the sensor network of the present station and transmits the information of the detected mobile station terminal via the adjacent sensor network radio terminal to the monitoring server. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wireless system, and more particularly to transmission of location registration information of a mobile terminal.

Conventionally, in a digital radio system using FDMA (Frequency Division Multiple Access) technology used in premises such as airports, stations, and subways, a plurality of radio base stations are arranged at intervals of several hundreds [m] to several [km]. Each radio base station performs radio communication with a mobile terminal at a different frequency.
When receiving the electric fields of a plurality of radio base stations, the mobile terminal selects a radio base station having a strong electric field, switches to a carrier frequency that allows radio communication with the radio base station, and captures the radio base station.
The mobile terminal notifies the line control device of information (location registration information) indicating which radio base station is captured.
The line control device registers the location registration information notified from each mobile station terminal.

  When the command board calls a mobile station terminal, or when a mobile station terminal calls another mobile station terminal via a radio base station, the line control device uses location registration information registered in its own device. Search, connect a line between both mobile stations, and control to make a call possible.

JP 2003-284154 A

Conventionally, when a call is made at a mobile station terminal near a call area boundary where radio waves of two or more radio base stations overlap, each time a caller who has the mobile station terminal crosses the call area boundary, the mobile station terminal The location registration information is notified. For this reason, handoff frequently occurs, and the line control device cannot smoothly retrieve the location registration information, so that there is a problem that the call tends to be interrupted.
Further, Patent Document 1 discloses a mobile station terminal tracking system in which a mobile station terminal periodically acquires position data and transmits a mail including the acquired position data to a transmission destination registered in advance. Transmitting the location registration information from the mobile station terminal to the radio base station regularly or every time it moves, causes an increase in traffic volume.
For example, when a large number of callers work near a call area boundary where radio waves of two or more radio base stations overlap, there are a large number of mobile station terminals, so the number of location registration information notifications is To increase. Since the transmission path for notifying location registration information (position data) is the same as the transmission path for performing wireless communication, there is a problem that the load on the radio base station and the line control device increases due to increased traffic. The call area of the radio base station is a range in which the radio base station and mobile station terminals in the call area can communicate with each other (transmit / receive).
An object of the present invention is to solve the above problems, reduce communication traffic, and provide an efficient handoff method.

In order to achieve the above object, the wireless system of the present invention reduces communication traffic and provides an efficient handoff by separately providing a transmission path for notifying location registration information and a transmission path used for a call. A method is provided.
That is, the wireless system of the present invention comprises means for notifying location registration information of a mobile station terminal using a sensor network wireless terminal.

  That is, the radio system of the present invention is a line control that controls communication between a mobile station terminal, a radio base station that communicates with the mobile station terminal, and communication between the mobile station terminal and the radio base station based on location registration information of the mobile station terminal. And a sensor network radio terminal provided in the communication area of the radio base station, and the sensor network radio terminal, and the latest location registration information of the mobile station terminal is stored in the line control device. The sensor network wireless terminal detects the mobile station terminal in the sensor network of the local station, and detects the information of the detected mobile station terminal via the adjacent sensor network wireless terminal. It is transmitted to the monitoring server.

  According to the present invention, it is possible to reduce communication traffic and provide an efficient handoff method in a digital wireless system using FDMA (Frequency Division Multiple Access) technology used in a premises such as an airport, a station, or a subway. it can.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In each drawing, parts having common functions are denoted by the same reference numerals, and redundant description thereof may be omitted.
The wireless system of the present invention will be described with reference to FIGS.
FIG. 1 is a block diagram showing an embodiment of a configuration of a radio station terminal of the present invention. 100 is a radio station terminal, 101 is an antenna for voice communication, 102 is a digital radio RF unit for voice communication, 103 is a digital radio baseband unit for voice communication, 104 is a storage unit, 105 is a control unit, 106 is a microphone, 107 Is an operation button, 108 is a liquid crystal display, 109 is a power supply unit, 110 is a speaker, 111 is an antenna for ZigBee, 112 is an RF unit for ZigBee, and 113 is a baseband unit for ZigBee.

FIG. 2 is a diagram showing the arrangement of sensor network wireless terminals according to an embodiment of the present invention. FIG. 2 is a plan view showing an airport concourse. Reference numeral 201 denotes a structure such as an outer wall or an inner wall of the concourse, and 01 to 61 denote a wireless terminal for the sensor network and a ZigBee wave reach (communication area) of the terminal, that is, a sensor network area. The sensor network area is a range in which the sensor network wireless terminal and the mobile station terminal in the sensor network area can communicate with each other (transmit / receive).
Further, as can be seen in FIG. 2, the sensor network areas overlap each other, so that adjacent wireless terminals for sensor networks can transmit and receive.
In the embodiment of the present invention, the reference numbers 01 to 61 of the sensor network wireless terminal or sensor network area are used as the ID numbers of the corresponding sensor network wireless terminals as they are.

  FIG. 3 is a schematic block diagram for explaining the configuration of an embodiment of a radio system using the sensor network radio terminal and the digital mobile radio terminal of the present invention. 301 is a line control device, 302 is a command console, 303 is a monitoring server for a sensor network, 304-1 is a radio base station (B1), 304-2 is a radio base station (B2), and 304-3 is a radio base station ( B3),..., 304-N is a radio base station (BN) (N is a natural number greater than 2), 305-1 to 305-K are mobile station terminals (K is a natural number), 306 is a sensor network area 01 to 62 is a frame showing 62. The wireless terminals for sensor network (ID numbers 01 to 62 correspond to the respective sensor network areas 01 to 62) communicate with the adjacent wireless terminals for sensor network by ZigBee, respectively, according to predetermined routes. Information is transmitted to the wireless terminal 18 for sensor network.

For communication between the sensor network wireless terminal 18 and the sensor network monitoring server 303, for example, the ZigBee wireless unit coupled wirelessly or wiredly from the sensor network monitoring server 303 is provided, and the ZigBee wireless unit and the sensor network are connected. The wireless terminal 18 performs mutual communication using ZigBee.
In the communication between the sensor network wireless terminal 18 and the sensor network monitoring server 303, information is transmitted to the sensor network monitoring server 303 via a wired or wireless network (for example, a wireless local area network (LAN)). You may do it.

A route for transmitting information from the sensor network wireless terminal to the monitoring server 303 is referred to as an upstream route, and a route for transmitting information from the monitoring server 303 to the sensor network wireless terminal having a specific ID number is referred to as a downstream route. The downstream route is also determined in advance for each wireless terminal for sensor network.
For example, in FIG. 4, the mobile station terminal (D) 405-4 can communicate with the sensor network wireless terminal 53, but the sensor network wireless terminal 53 receives information from the mobile station terminal (D) 405-4. Then, relay transmission is performed by ZigBee in the order of the wireless terminals 17 and 18 for the sensor network. Further, when there are a plurality of sensor network wireless terminals that can communicate with each other, each transmits information, and the monitoring server 303 integrates information such as ID (identifier) of the mobile station terminal.

  FIG. 4 is a diagram for explaining an operation mode of the wireless system of FIG. 301 is a line control device, 302 is a command console, 303 is a monitoring server for a sensor network, 304-1, 304-2 and 304-3 are radio base stations, 404-1 is a radio wave arrival of the radio base station 304-1 Range (call area), 404-2 is a radio wave reach range (call area) of the radio base station 304-2, 404-3 is a radio wave reach range (call area) of the radio base station 304-3, and 01 to 62 are dotted lines , The mobile station terminal (A), 405-2 and 405-2 ′ are mobile station terminals (B), 405-3 are mobile station terminals (C), and 405-4 is mobile. Station terminals (D) and 405-5 are mobile station terminals (E). In addition, a solid circle surrounding each mobile station terminal indicates a sensing range of each mobile station terminal.

  FIG. 5 is a diagram showing an embodiment of a position information table registered in advance in the mobile station terminal in the wireless system of the present invention. The ID number of the wireless terminal for sensor network in the callable area for each wireless base station is registered.

An embodiment of the present invention will be described with reference to the mobile station (A) 405-1 in FIG. This embodiment is an operation example when the mobile station terminal is powered on.
(1) The user turns on the mobile station terminal (A) 405-1.
(2) The mobile station terminal (A) 405-1 controls the ZigBee antenna 111, the ZigBee RF unit 112, and the ZigBee baseband unit 113 (see FIG. 1), and a plurality of sensor networks existing in the vicinity. Search for the terminal ID number.
(3) The mobile station terminal (A) 405-1 searches for the ID number of the sensor network terminal and acquires the ID number of the sensor network terminal, and the location information table (see FIG. 5).
(4) The mobile station terminal (A) 405-1 controls and acquires the voice communication antenna 101, the voice communication digital radio RF unit 102, and the voice communication digital radio baseband unit 103 (see FIG. 1). A radio base station to which a large number of ID numbers are assigned is selected.

Details of the embodiment in which the radio base station is selected in the item (5) will be described based on the verification in the item (3).
The ID numbers of the sensor network terminals acquired by searching by the mobile station terminal (A) 405-1 through the verification in the above item (3) are “36”, “35”, “34”, “01”, “02”. And
Next, the acquired ID number is collated with the position information table of FIG. As a result of the comparison, the number of the ID number is compared with the radio base station in which the acquired ID number is registered.
In this example, the wireless base station (B1) 304-1 has the acquired ID numbers “01”, “02”, “34”, “35”, “36”, and the included ID numbers. The number of is “5”. Further, the number of ID numbers included in the other radio base stations (B2) 304-2 to (BN) 304-N is “0”. Accordingly, the mobile station terminal (A) 405-1 selects the radio base station (B1) 304-1 that includes the largest number of ID numbers.

(5) The mobile station terminal (A) 405-1 controls the ZigBee antenna 111, the ZigBee RF unit 112, and the ZigBee baseband unit 113, and uses the sensor network (see FIG. 1) for the sensor network. The location registration information is transmitted (notified) to the monitoring server 303. The monitoring server 303 records the received location registration information in association with each mobile station terminal device, and outputs the latest location registration information to the line control device 301.
The line control device 301 determines on which radio base station each mobile station terminal should be connected based on the location registration information input from the monitoring server 303, and if there is a request, the determined radio base station The line connection between the mobile station terminals can be performed in a good communication state via the station. After the line connection, the mobile station terminals communicate with each other by the FDMA (Frequency Division Multiple Access) digital radio system via the radio base station selected by the line control device.
(6) The mobile station terminal (A) 405-1 searches for the ID numbers of a plurality of sensor network terminals existing in the vicinity at a predetermined time interval, and passes through the sensor network to monitor the sensor network monitoring server 303. Notify your location.
The location registration information is transmitted (notified) to the line control device 301 via the sensor network monitoring server 303.

Next, an example of operation when the mobile station terminal is turned off will be described.
(7) The user turns off the mobile station terminal (A) 405-1. Then, the location registration information for notifying the location of the mobile station terminal (A) 405-1 is not transmitted to the line control device 301.
(8) If the mobile station terminal (A) 405-1 is not notified of the location (it does not receive the location registration information) even after the predetermined time has elapsed, the monitoring server 303 sends the mobile station terminal (A ) It is determined that the power source of 405-1 has been cut off or has gone out of the facility, and the location registration information registered in the line control device 301 is deleted. As an erasing method, for example, position registration information different from the position registration information corresponding to the radio base station of the radio system, or data or a signal previously determined as deregistration may be output to the line control apparatus 301. . The line control device 301 determines that the power of the mobile station terminal (A) 405-1 has been cut off based on the input data or signal indicating deregistration.

An embodiment of the present invention will be described with reference to the mobile station terminal (B) 405-2 in FIG. This embodiment is an operation example when the mobile station terminal performs handoff at the boundary of the radio base station area. Here, the mobile station (B) 405-2 has already been powered on.
(1) The mobile station terminal (B) 405-2 searches for ID numbers of a plurality of sensor network terminals existing in the vicinity at predetermined time intervals.
(2) After searching, the acquired ID numbers of the plurality of sensor network terminals are collated with the position information table registered in advance in the mobile station terminal (B) 405-2 (see FIG. 5).
(3) If the radio base station to which a large number of acquired ID numbers are assigned is not the radio base station that is currently being acquired, the mobile station terminal (B) 405-2 sets the latest radio base station (acquired Handoff to a radio base station to which many ID numbers are assigned.
(4) The mobile station terminal (B) 405-2 controls the ZigBee antenna 111, the ZigBee RF unit 112, and the ZigBee baseband unit 113, and transmits it to the monitoring server 303 for the sensor network via the sensor network. Transmit location registration information. The monitoring server 303 records the received location registration information in association with each mobile station terminal device, and outputs the latest location registration information to the line control device 301.

Details of the embodiment for selecting a radio base station in the above item (3) will be described.
The ID numbers of the sensor network terminals acquired by searching by the mobile station terminal (B) 405-2 through the verification in the above (3) are “32”, “31”, “04”, “05”, “06”. Suppose that In this case, the acquired ID number is collated with the position information table of FIG. 5, and as a result of collation, the number of the ID number is compared with the radio base station in which the acquired ID number is registered.
As a result of collation with the position information table of FIG. 5, the wireless base station (B1) 304-1 has the acquired ID numbers “04”, “05”, “31”, “32”, and the included ID numbers. Is “4”. The wireless base station (B2) 304-2 has the acquired ID numbers “05”, “06”, and “31”, and the number of ID numbers included is “3”. The number of ID numbers included in other radio base stations (B3) 304-3 to (BN) 304-N is “0”. Accordingly, the wireless terminal (B) 405-2 performs communication at the current position via the wireless base station (B1) 304-1.

Next, the mobile station terminal (B) 405-2 moves, acquires the ID number at the position of the mobile station terminal (B ′) 405-2 ′, and the acquired ID number is stored in the position information table of FIG. Match. As a result of the comparison, the number of the ID number is compared with the radio base station in which the acquired ID number is registered. Assume that the ID numbers of the sensor network terminals obtained by searching are “05”, “06”, “07”, “42”, and “43”.
As a result of collation with the position information table of FIG. 5, the wireless base station (B1) 304-1 has the acquired ID number “05”, and the number of included ID numbers is “1”. The wireless base station (B2) 304-2 has the acquired ID numbers “05”, “06”, “07”, “42”, and “43”, and the number of ID numbers included is “5”. Is. The number of ID numbers included in other radio base stations (B3) 304-3 to (BN) 304-N is “0”. Accordingly, the mobile station terminal (B ′) 405-2 ′ changes the radio base station (B1) 304-1 at the previous position, and communicates via the radio base station (B2) 304-5 at the current position. I do.

An embodiment of the present invention will be described with reference to the mobile station terminal (C) 405-3 in FIG. This embodiment is an operation example in which the mobile station terminal is outside the range of the sensor network and within the communication area of the radio base station. Here, the mobile station terminal (C) 405-3 has already been powered on.
(1) The mobile station terminal (C) 405-3 searches for ID numbers of a plurality of wireless terminals for sensor network existing in the vicinity at predetermined time intervals.
(2) After the search, if the ID number of the wireless terminal for the sensor network cannot be acquired, the mobile station terminal (C) 405-3 moves to the callable area 404-3 of the wireless base station (B3) 304-3. It is determined that the boundary is outside the calling area, and the caller (user) is notified using the sound output of the speaker 110 or the display of the liquid crystal display 108.
(3) If the monitoring server 303 for the sensor network does not receive a location notification (location registration information) from the mobile station terminal (C) 405-3 even after a predetermined time has elapsed, It is determined that the power has been cut off or has gone out of the facility, and the location registration information registered in the line control device 301 is deleted. Also, a log (history information) such as the erased time is recorded.

One embodiment of the present invention will be described with reference to the mobile station terminal (D) 405-4 in FIG. This embodiment is an operation example in which the mobile station terminal is within the range of the sensor network and outside the communication area of the radio base station. Here, the mobile station terminal (D) 405-4 has already been powered on.
(1) The mobile station terminal (D) 405-4 attaches to its own terminal when the electric field of the captured radio base station (for example, the radio base station (B3) 304-3) falls below a predetermined value. The speaker (user) is notified that he / she is out of the calling area by using the sound output of the speaker 110 and the display on the liquid crystal display 108.
(2) The mobile station terminal (D) 405-4 controls the ZigBee antenna 111, the ZigBee RF unit 112, and the ZigBee baseband unit 113, and transmits to the sensor network monitoring server 303 via the sensor network. Notify you are currently out of range.

As described above, since the monitoring server 303 for the sensor network stores information such as a log relating to the operation state of the wireless system, the stored information (for example, a log of a call task transmitted from a mobile station terminal) is stored. Various information can be obtained by analyzing.
For example, by analyzing a log of a call task or the like transmitted from a mobile station terminal, it is possible to estimate where the insensitive area of the radio base station is.

An embodiment of the present invention will be described with reference to the mobile station terminal (E) 405-5 in FIG. This embodiment is an operation example in which the mobile station terminal is outside the sensor network range and outside the radio base station call area. Here, the mobile station terminal (E) 405-5 has already been powered on.
(1) The mobile station terminal (E) 405-5 is out of the communication range using the audio output of the speaker 110 or the display of the liquid crystal display 108 when the electric field of the captured radio base station falls below a predetermined value. This is notified to the caller (user).
(2) If the monitoring server 303 for the sensor network does not receive a location notification (location registration information) from the mobile station terminal (E) 405-5 even after a predetermined time has elapsed, It is determined that the power has been cut off or has gone out of the facility, and the location registration information registered in the line control device 301 is deleted. In addition, a log such as the erased time is recorded.

According to the first to fifth embodiments, since communication can be performed by separately providing a transmission path for notifying location registration information and a transmission path used for a call, the communication traffic volume of the call is reduced. In addition, an efficient handoff method can be provided.
Furthermore, by using a monitoring server, it becomes possible to reduce the amount of memory at the mobile station terminal and to centrally manage information such as logs. Furthermore, it is possible to check various states of the wireless system based on the information under the unified management, and it is easy to make use for improvement of the wireless system such as improvement of the operation state.

  As the power supply means of the wireless terminal for sensor network in the first to fifth embodiments of the invention described above, it is generally assumed that a dry battery is used, and the life of power is several months to several years. Moreover, it is also possible to use a part of the power source of an existing electric device such as an air conditioning facility or a lighting facility for the wireless terminal for the sensor network instead of the dry battery.

  When constructing a sensor network, it is temporarily advantageous to use a dry cell from the viewpoint that a network with high mobility and flexibility can be constructed. However, a dry battery has a lifetime and a usable period is limited. When building a system that uses a sensor network at a premises such as an airport, a station, or a subway, a large number of sensor network wireless terminals are used to prevent the sensor network wireless terminal from running out of battery power. Battery replacement work needs to be done regularly. Such replacement is costly and has a problem of low availability as a system.

  In order to avoid the above problem, it is also conceivable to use a part of the power supply of the existing electrical equipment such as air conditioning equipment and lighting equipment in the premises where the sensor network wireless terminal is installed, around or near the premises as the power supply for the sensor network wireless terminal . However, in this case, there is a problem that the degree of freedom is reduced in constructing the sensor network due to restrictions due to the installation state and structure of existing equipment.

In general, as a means for facility managers and security officers such as airports, stations, and subways to check for the presence of passengers on the premises and around the premises, an imaging device such as a camera can be used. Is generally used as video information.
The state of the premises and the surroundings of the premises can be acquired as video information by the imaging device, and facility managers and security officers such as airports, stations, and subways can check the existence of customers etc. around the premises and the premises. it can. However, it is difficult to accurately grasp the blind spots of the image pickup apparatus in the premises such as airports, stations, and subways, and in the vicinity of the premises. Furthermore, in order to store video information for a long period of time, it is difficult to leave a long history because the data capacity of the video information is large and the recording capacity of the storage device is limited.

The second object of the present invention is to provide the above problem by adopting a method of generating power inside the wireless terminal for the sensor network without supplying the power of the wireless terminal for the sensor network from the dry battery or the power supply of the existing electrical equipment. There is to solve.
For this reason, in Example 6 of the present invention, a plurality of wireless terminals for sensor networks are installed on the premises of an airport, a station, a subway, or the like, or under the floor around the premises, and vibration is applied to each of the installed wireless terminals for sensor networks. A power supply unit that converts energy into a wireless terminal for a sensor network is installed.
Then, when power is supplied to the wireless terminal for the sensor network, an information log such as vibration detection and power supply by vibration is transmitted to the monitoring server for the sensor network, and the monitoring server accumulates the data, Analyzes accumulated data.
Hereinafter, the wireless system of the present invention will be described with reference to FIGS. 1 and 6 to 9.

  FIG. 6 is a block diagram showing the configuration of an embodiment of the wireless terminal for sensor network of the present invention. 600 is a wireless terminal for sensor network, 610 is a communication module that communicates with a mobile station terminal by ZigBee and the like, and communicates with a monitoring server for sensor network, 630 is a power supply module, 611 is an antenna of the communication module 610, 612 Is the RF unit of the communication module 610, 613 is the baseband unit of the communication module 610, 614 is the storage unit of the communication module 610, 615 is the control unit of the communication module 610, 631 is the control unit of the power supply module 630, and 632 is the power supply module 630. The vibration power conversion unit (1), 633 is a storage battery of the power supply module 630, 634 is the vibration power conversion unit (2) of the power supply module 630, and 650 communicates various sensors included in the wireless terminal for network and sensing information of the various sensors. Module 610 A sensor unit for outputting to the control unit 615 by an access from the control unit 615.

The sensor unit 650 includes, for example, at least one sensor such as another wireless device, an RFID tag, a temperature sensor, a microphone, a humidity sensor, an acceleration sensor, an imaging unit, and the like, and detects information detected by the sensor of the communication module 610. This is output to the control unit 615. The control unit 615 stores the input sensor information in the storage unit 614, and transmits the sensor information to the request source at a predetermined time period or when there is a request from the radio base station or another mobile station terminal. Information recorded in the storage unit 615 is deleted or held as necessary.
Also, solid arrows in FIG. 6 indicate signal paths for control signals, control signals, data signals, etc., and short dashed arrows indicate power supply paths (power lines). The vibration power conversion unit (1) 632 converts minute vibrations of the building into electric power, and the vibration power conversion unit (2) 634 converts minute vibrations generated when the user walks into electric power.

  FIG. 7 is a diagram for explaining an embodiment of the control mode of the power supply module in the wireless system of the present invention. FIG. 7A illustrates a case where no one is on the floor near the sensor network wireless terminal, and FIG. 7B illustrates a case where a pedestrian is present on the floor near the sensor network wireless terminal. FIG. 7 (c) shows a person (employee, etc.) who has a business wireless terminal (mobile station terminal) on the floor near the sensor network wireless terminal, in this embodiment, a business wireless terminal. It is a figure explaining the case where the person who possessed is made into an employee. 700 is a mobile station terminal, 710 is a floor under the communication area of the wireless system, 711 is a sensor network wireless terminal installed under the floor 710, 712 is a floor surface, 723 is a customer moving on the floor surface 712, and 734 is a mobile station An employee who possesses the terminal 700.

  FIG. 8 is a diagram for explaining an operation mode of the wireless system of FIGS. 6 and 7. 801 is a line control device, 802 is a command console, 803 is a sensor network monitoring server, 804-1 is a radio base station (B1), 804-2 is a radio base station (B2), and 804-3 is a radio base station ( B3), 814-1 is the radio wave coverage (communication area) of the radio base station (B1) 804-1, 814-2 is the radio wave coverage (call area) of the radio base station (B2) 804-2, 814-3 Is a radio wave coverage (call area) of the radio base station (B3) 804-3, 01 to 62 are sensor network radio terminals and sensor network areas (communication areas) indicated by broken lines, and 805-1 is a mobile station terminal. (F), 805-2 is a mobile station terminal (G), 805-3 is a mobile station terminal (H), 806 is an outline transmission route of an information transmission signal, and 807 is an outline transmission route of a reception completion notification. Moreover, the circle surrounding each mobile station terminal indicates the sensing range of each mobile station terminal.

FIG. 9 is a diagram for explaining an operation mode of the wireless system when a disaster occurs in the wireless system of the present invention. 905-1 is a mobile station terminal (F), 905-2 is a mobile station terminal (G), 905-3 is a mobile station terminal (H), 915-1 is information via a sensor network, and 925-1 is voice communication. Information via digital wireless for communication, 925-2 is information via sensor network, 935-1 is information via sensor network, and 935-2 is information via digital wireless for voice communication.
A device marked with a cross is a device that cannot communicate for some reason.

With reference to FIG. 6, a wireless terminal for a sensor network in the wireless system of the present invention that operates in a premises such as an airport, a station, or a subway will be described.
In the power supply module 630 of the sensor network wireless terminal 600 in FIG. 6, the vibration power conversion unit (1) 632 detects minute vibrations of the building where the sensor network wireless terminal 600 is installed, and detects the detected information as a control unit 631. Output to. At the same time, the detected mechanical vibration is converted into electric energy and output to the storage battery 633. Similarly, the vibration power conversion unit (2) 634 detects minute vibrations that occur when a user or employee moves around the sensor network wireless terminal 600, and sends detection information to the control unit 631. Output. At the same time, the detected mechanical vibration is converted into electric energy, converted into electric power, and output to the storage battery 633.
The storage battery 633 accumulates the electric energy supplied from the vibration power conversion unit (1) 632 and the vibration power conversion unit (2) 634, and supplies the electric energy accumulated by the control of the control unit 631 to the control unit 631 as appropriate. To do. Similarly, the storage battery 633 outputs information on the accumulated electric energy to the control unit 631 as appropriate.
The control unit 631 of the power supply module 630 outputs the power supply log and the vibration detection log output from the vibration power conversion unit (1) 632 and the vibration power conversion unit (2) 634 to the control unit 615 of the communication module 610. To do. The control unit 631 of the power supply module 630 supplies power to the control unit 615 in accordance with the control of the control unit 615 of the communication module 610.

In the communication module 610 of the wireless terminal for sensor network 600, the control unit 615 outputs the power supply log and the vibration detection log input from the power supply module 630 to the storage unit 614. The storage unit 614 temporarily records the input power supply log and vibration detection log.
Then, the control unit 615 records the power supply log and the vibration detection log recorded in the storage unit 614 at regular intervals (when no disaster occurs) or at appropriate times (such as a command console or a monitoring server). The baseband unit 613 and the RF unit 612 are controlled and transmitted to the sensor network monitoring server 803 (see FIG. 8) via the antenna 611. After transmission, the log transmitted from the recording unit 614 to the monitoring server 803 is deleted. However, for example, when information is transmitted in response to a request from another mobile station terminal, the log is not deleted.

  As a means for converting mechanical vibrations of the vibration power conversion unit (1) 632 and the vibration power conversion unit (2) 634 into electric energy, for example, there is a vibration power generation apparatus described in JP-A-2005-137071, It is possible to convert minute vibrations of objects into LSI driving power.

Next, the operation of the sensor network wireless terminal 711 when no disaster occurs, that is, in a normal state will be described with reference to FIGS.
In FIG. 7, the wireless terminal for sensor network 711 performs sequential power supply control depending on whether or not the customer 723 and the employee 734 are present in the vicinity of the wireless terminal for sensor network 711, and when the power is supplied. The history of Taka is temporarily stored in the storage unit 614.

  In FIG. 7A, since the sensor network wireless terminal 711 installed in the floor 710 has no moving object such as a customer or an employee on the floor 712, the vibration power converter (2) 634 has the power Does not occur. However, the vibration power converter (1) 632 detects mechanical vibration in the installed building and converts it into electrical energy. Then, the detection information is temporarily recorded in the storage unit 614 via the control unit 631 and the control unit 632. The generated electrical energy (generated power) is output to the storage battery 633, and the storage battery 633 stores the input power.

As described above, when the control unit 631 of the power supply module 630 detects that only the vibration power conversion unit (1) 632 generates power and the stored power of the storage battery 633 is less than a predetermined value, the control unit 631 Then, notification is made to shift to the sleep mode, and power control is performed so as to supply the minimum necessary power.
That is, the control unit 631 of the power supply module 630 controls the vibration power conversion circuit (1) 632 so that mechanical vibration can be efficiently converted into electric power.
Then, the control unit 631 of the power supply module 630 notifies the communication module 610 to operate in the sleep mode. The control unit 615 of the communication module 610 shifts to the sleep mode according to the notification and maintains the mode until a change notification is received. In the sleep mode, the control unit 615 stops the operation of the RF unit 612, the baseband unit 613, and the storage unit 614, and stops supplying power.

In addition, when the control unit 631 of the power supply module 630 detects that only the vibration power conversion unit (1) 632 generates power and the stored power of the storage battery 633 is greater than or equal to a predetermined value, Notification is made to shift to a standby state (power saving mode), and power control is performed so as to supply the minimum necessary power.
In addition, when it is detected that the storage power of the storage battery 633 is sufficient, power control is performed so that the communication module 610 is supplied with the necessary minimum power in a standby state.
That is, the control unit 631 of the power supply module 630 controls the vibration power conversion circuit (1) 632 so that mechanical vibration can be efficiently converted into electric power.
Then, the control unit 631 of the power supply module 630 notifies the communication module 610 to operate in the power saving mode. The control unit 615 of the communication module 610 shifts to the power saving mode according to the notification and maintains the mode until a change notification is received. In the power saving mode, the control unit 615 supplies power to the RF unit 612, the baseband unit 613, and the storage unit 614, and sets the standby operation.
As a result, the communication module 610 is in a state (standby state) where it can receive radio waves output from other adjacent wireless terminals for sensor network under the control of the control unit 615.

Next, in FIG. 7 (b), the sensor network wireless terminal 711 installed in the underfloor 710 generates power at the vibration power conversion unit (2) 634 because the customer 723 exists on the floor 712. To do. For this reason, the vibration power conversion unit (2) 634 detects mechanical vibration generated on the floor surface 712 as the user 723 moves and converts it into electrical energy. Then, the detection information is temporarily recorded in the storage unit 614 via the control unit 631 and the control unit 632. Then, electric energy corresponding to the magnitude, amplitude, and frequency of the generated mechanical vibration is generated, and the generated electric energy (generated electric power) is output to the storage battery 633. The storage battery 633 accumulates the input power.
In addition, the vibration power conversion unit (1) 632 detects mechanical vibration in the installed building, converts it into electrical energy, and outputs it to the storage battery 633. The storage battery 633 accumulates the input power. Then, the detection information is temporarily recorded in the storage unit 614 via the control unit 631 and the control unit 615.

As described above, the control unit 631 of the power supply module 630 is configured such that both the vibration power conversion unit (1) 632 and the vibration power conversion unit (2) 634 generate power, and the stored power of the storage battery 633 is less than a predetermined value. Is detected, the communication module 610 is notified to shift to the sleep mode, and power control is performed so as to supply the minimum necessary power.
That is, the control unit 631 of the power supply module 630 controls the vibration power conversion circuit (1) 632 and the vibration power conversion unit (2) 634 so that mechanical vibration can be efficiently converted into electric power.
Then, the control unit 631 of the power supply module 630 notifies the communication module 610 to operate in the sleep mode. The control unit 615 of the communication module 610 shifts to the sleep mode according to the notification and maintains the mode until a change notification is received. In the sleep mode, the control unit 615 stops the operation of the RF unit 612, the baseband unit 613, and the storage unit 614, and stops supplying power.

Further, the control unit 631 of the power supply module 630 generates both the vibration power conversion unit (1) 632 and the vibration power conversion unit (2) 634, and the control unit 631 of the power supply module 630 includes the vibration power conversion unit (1). 632 and the vibration power conversion unit (2) 634 both generate power and detect that the remaining capacity of the storage battery is sufficient, immediately when there is a call from another network wireless terminal Power control is performed so that the large amount of power required to emit radio waves can be instantaneously supplied at any timing.
The control unit 631 of the power supply module 630 controls the vibration power conversion unit (1) 632 and the vibration power conversion unit (2) 634 so that mechanical vibration can be efficiently converted into electric power.
Then, the control unit 631 of the power supply module 630 notifies the communication module 610 to operate in the normal mode.

The communication module 610 controls the control unit 615 to search for a state (standby state) in which radio waves from other adjacent sensor network wireless terminals can be received and whether the mobile station terminal is in the vicinity. Transmit radio waves at regular time intervals.
The control unit 515 of the communication module 610 supplies power necessary for transmission / reception to the RF unit 612 and the baseband unit 613.

In FIG. 7C, the sensor network wireless terminal 711 installed in the floor 710 is an employee who has a customer 723 and a business wireless terminal (mobile station terminal 700) on the floor 712. Since 734 exists, power is generated by the vibration power converter (2) 634. For this reason, the vibration power conversion unit (2) 634 detects mechanical vibration generated by the customer 723 and the employee 734 moving on the floor 712, and converts it into electric energy. Then, the detection information is temporarily recorded in the storage unit 614 via the control unit 631 and the control unit 632. Then, electric energy corresponding to the magnitude, amplitude, and frequency of the generated mechanical vibration is generated, and the generated electric energy (generated electric power) is output to the storage battery 633. The storage battery 633 accumulates the input power.
In addition, the vibration power conversion unit (1) 632 detects mechanical vibration in the installed building, converts it into electrical energy, and outputs it to the storage battery 633. The storage battery 633 accumulates the input power. Then, the detection information is temporarily recorded in the storage unit 614 via the control unit 631 and the control unit 615.

As described above, the control unit 631 of the power supply module 630 is configured such that both the vibration power conversion unit (1) 632 and the vibration power conversion unit (2) 634 generate power, and the stored power of the storage battery 633 is less than a predetermined value. Is detected, the communication module 610 is notified to shift to the power saving mode.
That is, the control unit 631 of the power supply module 630 controls the vibration power conversion circuit (1) 632 and the vibration power conversion unit (2) 634 so that mechanical vibration can be efficiently converted into electric power.
Then, the control unit 631 of the power supply module 630 notifies the communication module 610 to operate in the power saving mode. The control unit 615 of the communication module 610 shifts to the power saving mode according to the notification and maintains the mode until a change notification is received. In the power saving mode, the control unit 615 supplies power to the RF unit 612, the baseband unit 613, and the storage unit 614, and sets the standby operation. In the standby operation, a response is made only when a call is made from a nearby mobile station terminal or another adjacent wireless terminal for sensor network.
As a result, the communication module 610 is in a state (standby state) where it can receive radio waves output from a nearby mobile station terminal or another adjacent wireless terminal for sensor network under the control of the control unit 615.

Further, the control unit 631 of the power supply module 630 generates both the vibration power conversion unit (1) 632 and the vibration power conversion unit (2) 634, and the control unit 631 of the power supply module 630 includes the vibration power conversion unit (1). 632 and the vibration power conversion unit (2) 634 both generate power, and when it is detected that the remaining amount of the storage battery is sufficient (the remaining amount is not less than a predetermined value), When a call is made from a wireless terminal, power control is performed in the normal mode so that a large amount of power required to immediately emit radio waves can be instantaneously supplied at any timing.
The control unit 631 of the power supply module 630 controls the vibration power conversion unit (1) 632 and the vibration power conversion unit (2) 634 so that mechanical vibration can be efficiently converted into electric power.
Then, the control unit 631 of the power supply module 630 notifies the communication module 610 to operate in the normal mode.

The communication module 610 communicates with another adjacent wireless terminal for sensor network, and outputs a power supply log so that the power supply log is transmitted to the monitoring server 803. In addition, wireless communication is performed with business wireless terminals (neighboring mobile station terminals) held by employees.
The control unit 615 of the communication module 610 supplies power necessary for transmission / reception to the RF unit 612 and the baseband unit 613.

The operation of the mobile station terminal according to the embodiment of FIG. 7 (c) will be described with reference to FIG.
The mobile station terminal (F) 805-1, the mobile station terminal (G) 805-2, and the mobile station terminal (H) 805-3 are wireless terminals for sensor networks within the range in which the circle indicates the sensing range And the location registration information of the mobile station terminal is transmitted to the monitoring server 803. The sensor network wireless terminal sequentially transmits the information to the other adjacent sensor network wireless terminals, and is finally transmitted from the sensor network wireless terminal (18) to the monitoring server 803. As a result, the line control device 801 obtains the latest position information from the monitoring server 803, so that the mobile station terminal (F) 805-1 is in the call area 814-3 of the radio base station (B3) 804-3. I can recognize that. Similarly, the line control device 801 recognizes that the mobile station terminal (G) 805-2 is in the call area 814-2 of the radio base station (B2) 804-2, and the mobile station terminal (H) 805- 3 can be recognized as being within the call area 814-1 of the wireless base station (B1) 804-1.
That is, for example, the mobile station terminal (G) 805-2 communicates with the sensor network wireless terminal 09 that can be sensed, and the sensor network wireless terminal 09 is in the sensor network area within the mobile station terminal (G) 805. 2 is detected. Accordingly, the sensor network wireless terminal 09 transmits the information to the adjacent sensor network wireless terminal 10. In the same manner, the sensor network radio terminal 18 communicates with the adjacent sensor network radio terminals 11, 12, 13, 14, 15, 16, 17, and 18.

  As described above, the sensor network wireless terminal 711 uses the power supply history information (log) recorded in the storage unit 614 in the sensor network during normal times (when an abnormal situation such as a disaster or an accident does not occur). Information is transmitted to the sensor network monitoring server 803 via a route such as the transmission route 806. The monitoring server 803 transmits a response that the log has been received (reception completion notification) to the sensor network wireless terminal 711 through a route such as the transmission route 807. After receiving the reception completion message, the sensor network wireless terminal 711 deletes the transmitted log from its own storage unit 614.

Next, the operation when an abnormal situation occurs will be described mainly with reference to FIG.
Three cases are assumed when the sensor network radio terminal 711 and the radio base stations 804-1 to 804-N break down when an abnormal situation occurs and a person who is left behind in the building is searched or confirmed for safety. The following is an example of each operation.

(Case 1)
When the mobile station terminal (F) 905-1 in the call area 814-3 of the radio base station (B3) 804-3 tries to talk, the radio base station (B3) 804-3 fails, When the sensor network 915-1 to the monitoring server 803 is alive, information is transmitted via the sensor network 915-1.
That is, the mobile station terminal (F) 905-1 has the sensor network wireless terminals 14, 50, and 51 within the sensing range. Accordingly, the mobile station terminal (F) 905-1 can communicate with the three sensor network wireless terminals 14, 15, 50, and 51, respectively. Then, the sensor network wireless terminal 18 transmits information to the monitoring server 803 while relaying between adjacent sensor network wireless terminals (transmission route 915-1). The line control device 801 is coupled to the line control device 801 via the monitoring server 803, and the line control device 801 further relays via the wireless base station or from the monitoring server 803 via the sensor network 915-1 at the sensor network wireless terminal. As a result, information is transmitted to a desired mobile station terminal. At this time, the monitoring server 803 first receives the location registration information from each sensor network wireless terminal and can, for example, be coupled to the sensor network wireless terminal 18 earliest (or the number of terminals to be relayed is small) or Select sensor network wireless terminals that can transmit in the best radio wave condition, transmit to those sensor network wireless terminals, and select so that the optimal sensor network wireless terminal and mobile station terminal (F) 905-1 can talk can do.

(Case 2)
When the mobile station terminal (G) 905-2 in the communication area 814-2 of the wireless base station (B2) 804-2 tries to make a call, information transmission through the sensor network to the monitoring server 803 is impossible (during transmission). However, if the wireless base station (B2) 804-2 is alive, the sensor network wireless terminal 43 is a mobile station terminal (G) 905-2. Up to this point, information is transmitted via the sensor network, and after the mobile station terminal (B2) 804-2, information is transmitted via any channel of the digital radio for voice communication.
Also, the mobile station terminal (G) 905-2 transmits the registered position information to the radio base station (B2) 804-2 and can communicate with other mobile station terminals, as in the past.

That is, when the sensor network wireless terminal 43 senses an employee or customer who does not have mobile station radio (when vibration due to movement is detected and converted into electric energy), the adjacent sensor network wireless terminal To the radio base station (B2) 804-2 and the line control device 801 via the mobile station terminal (G) 905-2. This is schematically shown as a transmission route 925-1.
In addition, as a relay system when a mobile station terminal receives communication not addressed to itself from a wireless device such as another mobile station terminal, there is a description in, for example, JP-A-2002-198892.

(Case 3)
When the mobile station terminal (H) 905-3 in the communication area 814-1 of the wireless base station (B1) 804-1 tries to make a call, information transmission through the sensor network to the monitoring server 803 is impossible, and When the radio base station (B1) 804-1 is out of order, information is transmitted to the mobile station terminal (H) 905-3 via the sensor network. The mobile radio terminal (H) 905-3 transmits the acquired information to an employee or the like using display on a liquid crystal display or the like, or sound from a speaker.
That is, whether or not a mobile station terminal such as a business radio terminal is held, when the mobile station terminal (H) is away from the call area 814-1 like the person 950, the mobile station terminal (H) In 905-3, information obtained by acquiring sound from the person 950 is communicated to the outside through speaker output, liquid crystal display, or the like. Of course, in the case of a person who does not have a mobile station terminal, the same applies to the call area 814-1.

In the sixth embodiment, mechanical vibrations are converted into electrical energy, and the sensor network wireless terminal is operated by the converted electrical energy, detects that a user or the like is in the vicinity, and transmits it to the monitoring server. ing. However, the detection may be detection by other sensors in addition to detection by vibration, or a combination thereof.
Further, it may be a sensor network wireless terminal in an environment where power can be sufficiently supplied.

As described above, the sensor network wireless terminal 711 uses the power supply history information (log) recorded in the storage unit 614 during normal times or when an abnormal situation occurs (when an abnormal situation such as a disaster or accident occurs) Information is transmitted to the monitoring server 803 for the sensor network via the sensor network.
After receiving the power supply history information (log), the monitoring server 803 transmits a reception completion notification to the sensor network wireless terminal 711.
Next, with reference mainly to FIG. 8, the description of the sixth embodiment of the present invention will be continued.
After receiving the reception completion notification, the sensor network wireless terminal 711 deletes the power supply history information transmitted to the monitoring server 803 from the storage unit 614.
The monitoring server 803 sorts the power supply history information acquired from each sensor network wireless terminal 711 into time-series data so that the administrator (user) can check at any time, and the traffic history of the customer 723 and the employee 734 Are sequentially processed in time and space.

Thus, in the power supply module 630, the mechanical energy generated by the vibration of the building is converted into electrical energy, the control unit 631 generates power only from the vibration power conversion unit (1) 632, and the power storage amount of the storage battery 633 is sufficient. When it is detected that the user or employee is not passing (moving), it is not necessary to notify the monitoring server 803, so that the communication module 610 is provided with the minimum necessary power in the standby state. Power supply control is performed to supply power.
That is, the control unit 631 of the power supply module 630 controls the vibration power conversion unit (1) 632 so that power can be efficiently converted from mechanical vibration.
Then, the control unit 631 of the power supply module 630 notifies the communication module 610 to operate in the power saving mode.

In addition, in the Example of the said FIGS. 6-9, the two vibration electric power conversion parts are provided, and one can convert the energy of the vibration frequency band of a building into electric power efficiently. On the other hand, the energy in the vibration frequency band generated based on the movement of a customer or employee (including a cart for carrying goods) can be efficiently converted into electric power.
Note that both may be replaced by a power source such as a solar battery, and vibrations by a building or vibrations by a user station or an employee may be distinguished by a vibration sensor.
In addition to the two types of classification, the movement of the vehicle or the like may be further distinguished in consideration of the case where it is installed outdoors, in a factory, or the like.

As described above, the wireless system of the present invention reduces the communication traffic by using a sensor network configured with ZigBee or the like as a wireless network for the mobile station terminal to notify the location registration information, and an efficient handoff method. Is realized.
In a mobile radio system that acquires location registration information of a mobile station terminal using a sensor network configured with ZigBee or the like, the sensor network radio terminal is fixedly provided at a predetermined position, and mechanical vibrations of the building are generated. A sensor network wireless terminal that operates semipermanently is realized by converting it into electrical energy and using it as electric power.
Further, in the sensor network wireless terminal of the sensor network constituted by the above ZigBee etc., the power consumption is changed by switching the sleep mode, the power saving mode, and the normal mode according to the amount of power of the storage battery in normal times, when an abnormal situation occurs. Reduce.
Furthermore, there is provided means for easily and centrally acquiring and managing a log of a call task of a mobile station terminal by a monitoring server connected to a sensor network without using a measurement jig. Similarly, by acquiring and analyzing a log indicating that power is supplied to the sensor network wireless terminal, it is possible to check in time series whether or not there are users or employees near the sensor network wireless terminal.

In the above embodiment, ZigBee is used as a communication means between the mobile station terminal and the sensor network wireless terminal. ZigBee is a standard that can handle a relatively small amount of data, can be used for long distance transmission of up to 100 [m] with low power consumption, and the number of nodes in the network is virtually unlimited. For this reason, since it can be applied to a wireless system that requires a large number of wireless base stations in a wide area, it is an effective communication means. ZigBee is suitable for communicating with an unspecified number of terminals since there is no authentication process. However, the communication means is not limited to ZigBee, and other communication means may be used.
In addition, although a liquid crystal display is used as an example of the display device, the present invention is not limited to this.

The block diagram which shows one Example of a structure of the radio station terminal of this invention. The figure which shows arrangement | positioning of one Example of the radio | wireless terminal for sensor networks of this invention. The typical block diagram for demonstrating the structure of one Example of the radio | wireless system of this invention. The figure for demonstrating the one operation form of the radio | wireless system of this invention. The figure which shows one Example of the positional information table previously registered into the digital radio | wireless terminal of the radio | wireless system of this invention. The block diagram which shows the structure of one Example of the radio | wireless terminal for sensor networks of this invention. The figure for demonstrating one Example of the control form of the power supply module in the radio | wireless system of this invention. The figure for demonstrating one operation | use form of the radio | wireless system of FIG. 6 and FIG. The figure for demonstrating one operation | use form of the radio | wireless system at the time of the disaster occurrence in the radio | wireless system of this invention.

Explanation of symbols

  01 to 61: sensor network wireless terminal and its communication area, 101: antenna for voice communication, 102: digital radio RF unit for voice communication, 103: digital radio baseband unit for voice communication, 104: storage unit, 105: control , 106: Microphone, 107: Operation button, 108: Liquid crystal display, 109: Power supply unit, 110: Speaker, 111: ZigBee antenna, 112: ZigBee RF unit, 113: ZigBee baseband unit, 201: Concourse , 301: line control device, 302: command console, 303: monitoring server, 304-1, 304-2, 304-3,..., 304-N: radio base station, 305-1 to 305-K: mobile station terminal, 306: sensor network area Frames indicating 01 to 62, 404-1, 404-2, 404-3: call area, 405-1: mobile station terminal (A), 405-2, 405-2 ′: mobile station terminal (B), 405 -3: mobile station terminal (C), 405-4: mobile station terminal (D), 405-5: mobile station terminal (E), 600: wireless terminal for sensor network, 610: communication module, 630: power supply module, 611: Antenna, 612: RF unit, 613: Baseband unit, 614: Storage unit, 615: Control unit, 631: Control unit, 632: Vibration power conversion unit, 633: Storage battery, 634: Vibration power conversion unit, 650: Sensor unit, 700: Mobile station terminal, 710: Under floor, 711: Sensor network wireless terminal, 712: Floor surface, 723: Customer, 734: Employee, 801: Time 802: Command console, 803: Monitoring server, 804-1: Radio base station (B1), 804-2: Radio base station (B2), 804-3: Radio base station (B3), 814-1 8141-2, 814-3: Call area, 805-1: Mobile station terminal (F), 805-2: Mobile station terminal (G), 805-3: Mobile station terminal (H), 806: Information transmission signal 807: Schematic transmission route of reception completion notification, 905-1: Mobile station terminal (F), 905-2: Mobile station terminal (G), 905-3: Mobile station terminal (H), 915-1: Information via sensor network, 925-1: Information via digital radio for voice communication, 925-2: Information via sensor network, 935-1: Information via sensor network, 935- : Information via digital radio for voice communication, 950: People.

Claims (1)

In a radio system comprising a mobile station terminal, a radio base station that communicates with the mobile station terminal, and a line control device that controls communication between the mobile station terminal and the radio base station based on location registration information of the mobile station terminal,
A sensor network wireless terminal provided in the communication area of the wireless base station;
A monitoring server that is coupled with a sensor network wireless terminal and outputs the latest location registration information of the mobile station terminal to the line control device;
The sensor network wireless terminal detects the mobile station terminal in the sensor network of the local station, and transmits information of the detected mobile station terminal to the monitoring server via an adjacent sensor network wireless terminal. Wireless system.

Images